Moldboard.



o. K. MILLER.

MOLDBOARD.

APPLICATION FILED SEPT. 5, 1911.

Patented Aug. 27, 1912.

`INVENTUR C/zareJM'ZZer WlTNESSES a uuiTEn sTATEs PATENT oEEioE CHARLESK.. MILLER, OF WAXAHAGHIE, TEXAS, ASSIGNOR 0F ONE-THIRD TO R. J'.COLEMAN AND ONE-THIRD T0 W. A. MARTIN, BOTH 0F WAXAHACHIE, TEXAS.

MoLDBoARD.

Specification of Letters Patent.

Patented Aw?. 27,1912.

Application led. September 5, 1911. Serial No. 647,559.

more` particularly to certain improvements.

upon the 'consti-notion covered by the applicants previous application"tiled April 1, 1911, under Serial Number 618,365.

The primary object of the invention is to provide aA mold-board to whichthe earth will not adhere.

In working certain kinds of land, such as black waxy l land', or inplowing fields that are wet andmuddy, the upturned earth has 1a strongtendency to adhere to the moldboard on a plow, producing the necessityof frequent cleaningr and somewhat increasing the draft. lt has beenfound that this tendency mayA be overcome by providing the mold-board ofa plow with a facing of material, such plaster-of-Paris, which willreadily shed the earth, and will not require any ,cleaning if keptslightlyvmoist. But it has been also found that after -a mold-board ofthis description has been used upon a plow for sometime, theplaster-of-Paris coating is apt to become quite dry, and under suolicircumstances, the material loses to some extent its ability to scour,or to shed the earth. In usingsuch a mold-board therefore it becomesnecessary at such times to throw water on the plasterofParis coating, sothat it will regain its efficiency.

rl`he improved feature presented in this invention consists in theprovision of a recess or container between the plaster-of- Paris coatingand the mold-board proper, which container will hold a sutlicient-`supply of water to keep the coating constantly moistened during anentire days plowing or longer, tle moisture. gradually seeping throughthe plaster-of-Paris, and being replaced therein as rapidly as it isevaporated, or taken up by the earth.

Finally the object Aof the invention is to provide a device of thecharacter described, that will be strong, durable, simple and etlicient,and comparatively easy to construct, and one that will not be likely toget out of working order.

lith these and various other objects in view, my invention has relationto certain novelfeatures of the construction and operation, an exampleof which is described in the following specification, and illustrated inthe accompanying drawing, wherein:

Figure 1 is a side elevation of the herein described mold-board,occupying its proper working position with relation to the plowshare,the latter being shown in dotted line. Fig. 2 is a similar view of themold-board in side elevation, with the plaster-of-Paris omitted, so thatthe wire netting is revealed which forms a partition between the plasVter-of-Paris coating, and the recess at the` back of 'said coating.Fig. 3 is a -view of the mold-board in cross-section, thesection beingtaken upon the. line :i3-a2 of Fig. 1.

Referring now more particularly to the drawing, wherein like' letters ofreference designate similar parts i-n all the figures, the letter Adenotes a sheet of metal, preferably of steel, having the shape andformI of an ordinary mold-board,v but having all of its edges upturnedat right angle to said sheet, as indicated 'at B. A piece of screen ornetting C formed of heavy wire is secured to the face of the plate A bya number of bolts or rivets D. The outline of the netting C conforms tothe face of the plate A, the

- edges of said netting being slightly spaced from the flange- B. Thenettingis made slightly curved, so that its 'central portion is spacedslightly from the face of the plate A leaving a recess E, adapted to betlledwith water. A pipe F passing through the plate A near the centerthereof communicates with the recess E, and is vadapted to supply saidrecess with water. A drain-cock G may be made tocoinmunicate through the-plate A with the lower portion of the. recess E, so as to permit thewater to be readilyl drained from said recess in order to prevent theplate A being rusted when the plow is not 1n use.

A The plaster-of-Paris facing is denoted by I the letterI-l.4 Beforethis facing israpplied to the plow, a sheet J of paper or some similarfabric should be laid u on the Wire netting C to prevent the plasticmaterial from passing through the apertures ofthe' netting. The coatingof plasterfof-Paris'should be 'ven a smooth surface that will come fluswith theedges of the ange B, said all kinds of earth freely.- The Vwaterwill ooze through the plastic coating at a Very gradual rate, yetsufficiently fast to keep the surface of said Acoating damp enough toreadily throw off the upturned earth. Since the wear upon a mold-boardis Very slight, the above described device may be used for a long periodof time before it will be necessary to replace the plaster-of-Pariscoating.

It is apparent, however, that this may be done in a very short time, andat a low cost.-

It is possible that some other plastic material than plaster-of-Parismight be ernployed to form the mold-board facing H,

andit is also v`clear tliatthe recess at the back of the mold-boardmight Apossibly be dev signed in some other manner than that shown inthe drawing. The invention' 1s therefore presented as including lallchanges vhavin-g its edgesupturned upon the face, a

wire netting secured to said face, and having its central .portionspaced therefrom, and a coating of plastic material retained upon theface ofthe mold-board by lsaid screen and the upturned edges.

In testimony whereof I have 'signed my name to' this specification inthe presence of two subscribing witnesses. v

. CHARLES K. MILLER. Witnesses:

G. W. COLEMAN, J. E. B A'roHLoR.

Copies 'of thisv patent may be `obtained for 've centseach, byaddressing the Commissioner of Patents.

' Washington, D. C. `v

